Fix third concept not being used

app.py

@@ -90,7 +90,7 @@ def count_files(*inputs):
     file_counter = 0
     concept_counter = 0
     for i, input in enumerate(inputs):
-        if(i < maximum_concepts-1):
+        if(i < maximum_concepts):
             files = inputs[i]
             if(files):
                 concept_counter+=1